Injector



March 21, 1939. B. E. FOLKE 2,151,658

INJECTOR Filed Oct. 1, 1938 4 Sheets-Sheet 1 FIG. I

Elf/V67 E. FOL/6E INVENTOR ATTORNEY March 21, 1.939. B E, FOLKE 2,151,658

INJECTOR Filed Oct. 1, 1958 4 Sheets-Sheet 2 FIG. 2

75 30 14 a 2; l4 32 18 4a BEA/67" E. FOL/BE INVENTOR 7 Mm/m ATTORNEY B. E. FOLKE INJECTOR March 21, 1939.

Filed Oct. 1. 1958 4 Sheets-Sheet 3' 74 FIG. 3

24 35 is 2s 54 Z67 20 39 33 22 If, /5 l6 2 ATTORNEY March 21, 1939. B. E. FOLKE INJECTOR 4 Sheets-Sheet 4 Filed Oct. 1, 1938 BEA/67 E. FOL/(E INVENTOR /mi ATTORNEY Patented Mar. 21, 1939 UNITED "STATES rar sm oeri ce INJECTOR Bengt E. Folke, Mamar Nathan Manufacturing Company, New York,

N.Y., a; corporation of New-York Application October 1, 1938, Serial No. -23 2,720

' 17 Claims.

: iautomaticallyfco=related to the volume "of water handled.

A: further object is to provide balancedvalve means to permit 1 effortless operation and gradual 'admission'of steam into theinjector.

. astin further *objects will become apparent-in the following specificationan'd in the drawings inwhich aipreferred. embodiment of the invention 1 is :shown.

In the drawings,

- Figa 1 shows a front I elevational view of an injector and its operating mechanism embodying the principles of this invention as'applied to the .frame of a locomotive, thelatter being" shown diagrammatically only;

Fig. 2'shows a fragmentary longitudinal section throughthe upper part-of the injector partly in elevation, the injector being shown '-'ina closed position;

Fig. 3 is -a fragmentary sectional view similar .30 to the one shown in Fig. 2 except that theinjector is shown 'in an open orop'erating position;

'Fig. Pisa plan view of'theinjector proper; "Figl5 is a fragmentary elevational side view of the steam andkwater operating mechanism shown 35 ine. closed position;

Fig. 6 is a fragmentary elevational-sideview similartothe oneshown in Fig. 5' except that the operatingparts are shown in the position they assume when the injector is working; and

4.0 Fig. 7 is a fragmentary sectional longitudinal view of the water'valve 1n the position which it assumes when theinjector should break.

Like characters of references .denote similar parts throughout thecseveral views and the following specification.

Referring to'Fig; 2, is the upper 'part'of an :injector body provided-with-a water inlet at H and a steam inlet at l2. Injector deIiVeryTend and overflow mechanism arelomitted, beingwelltdknown in the art. A Water valve l3. guided at 14 and I5 .and seating .upon the body at l6 controls the admission of water-intoa chamber ll.

-The. bottom. guide l4forthe water valve l3 termi- -nates in alower :edge- I 4a. The -waterva1ve l3 vis'providedwith==awthrottlingdisc H3 at its hotiguided within a sleeve .33 held in place by a cap 134. A-stufiin'g'box'35 isprovided at the top of ssteam valve caps :23 and 34 by clamp nuts 50 and 5|. -52 and 53are "standardsvertically projectingfrom thebracket'49 aridterminating in 'crummed.

tomhavingan upperedge 18a. A valve-stem I 9 --is yieldingly :connected' to' the valve by means .of

a gland nut 20 and'tcoil spring-2 I, resting against a head 22 of the-valvestem below nut 263. "The chamber ll isaclo'sed at-its upper end by a bonnet a 23 provided at its top' with a stufiing box '24and havingat its bottom: an extension into the chamber l lterminating. in a lower edge 95a toiprovide the guide I5-for the water valve. Thewatervalve spindle i9 is connected by means of aclevis 25 a -A main steam valve 28 controls admission into the. injector from steam inlet 12 makinga steamtight joint at 29 .upona'seat 3%) having a diverging opening 30a. Steam'valve .28 isprovided with 15 an extension" 3| with an enlarged head :3 Ia having .a slidingfit in a' centralbore at the-upper part of? a 'steam nozzle 32.

Theupper part of the main'steam valve 28 is cap 34. The upper part'of main steam valve 28 is closedbyran'stop'nut36 loosely fitting around a valvestem 31 to which-a'pilot valve 3B-is connectedby. means of a nut' 39. 25

"40 are transverse steam'openings through the wall of the main"steam valve 28-above its 'pil'ot valve seat. "dliis'a restricted annular steam'passage formedby'thel sl'eeve 33 and theoutside of the valve 28. 42*is'areducedportion of the extension'3l, its =upperpartwhere it is joined-to the .main valve '28 being "provided" with inclined transverse steam passages 43 immediatelyi below the pilot-valve seat.

Steam nozzle 32 has-a central extension '44 around whichis' screwed ajet nozzle 45 forming an annular steam space'46 therewith which is'in communication through passages-4'! in the nozzle 32"with the'steamv supply when the main steam valve or pilot valveis open. Surrounding the extension 44 of the steam nozzle'32 is an intermediate nozzle lll of the usual construction forming an'a-nnular passage 48a therewith.

= 49 is'a bracket secured upon the waterfland sockets 54 and 55 to receive a pin 56to whicha closed "end 51 of the b-ifurcatedlever il is 'ful- 'd Valve-stem3l of the main steam 'valve is {no vided with a c1evis'5B" at its top which is fastened by meansofa pin 58a to arlink'member. 5fl-and by means of another pin 6ll'to'another link member 6| forming essentially a toggle joint. "I 'hevlink :55

member 6| is fastened to the bifurcated lever 21 by means of a pin 6|a. 62 and 62a are stops on member 59, and 63 and 63a are stops on member 6|, the stops straddling the pin 60 as clearly shown in Figs. 5 and 6. Externally of the links 69 and 6| upon the pin 60 are fastened, at each end, rollers 64 and 65. 66 and 61 are cams projecting laterally from standard 53 and adapted to engage the rollers 64 and 65 with convex vertical end faces 68 and concave bottom end faces 69 which meet at edge 10.

Referring to Fig. 1, H is a hand lever provided with the usual type of latch arrangement to engage with a quadrant 12. Hand lever II is provided with a crank 13 connected to a rod 14 for the purpose of raising and lowering injector operating lever 21.

The operation of the injector is as follows:

With the position of the injector hand lever H as shown in Figs. 1 and 2, an initial movement of the lever from its closed position lifts rod 14 and operating lever 21, link 26, clevis 25 and water valve stem l9 until the stem head 22 contacts gland nut 2|], when a continued movement lifts water valve I3 from its seat [6 admitting water from inlet ll into chamber I1 and into annular passage 48a around injector steam nozzle 32. A further upward movement of rod 14 fully opens the water valve and brings it to the position shown in Fig. 3.

When the water valve is open, the upward movement of pin 61a which holds the link member 6| to the operating lever 21 will have caused the two link or toggle joint members 59 and 6| to straighten out until stop 63 at the upper mem ber 6| contacts with stop 62 of the lower member 59 after the rollers 64 and 65 have cleared the bottom face 69 and edge 10 of the earns 66 and 61, as shown in Fig, 6. A further upward movement of rod II will then cause clevis 58 and valve stem 31 to be moved upwardly raising pilot valve 38 from its seat, permitting steam to enter through the annular steam passage 4| of restricted area, passage 40 and 43 into a steam space 15, whence it enters the radially disposed steam passages 41 in the steam nozzle and is discharged through annular steam passage 46 between jet nozzle and the main steam nozzle extension 44, as clearly shown in Fig. 3. Steam discharged from jet nozzle 45 into passage 48a creates a partial vacuum in the water space H in a manner well-known to those familiar with the art. It will be noted that annular steam passage 4i is restricted so as to admit steam at reduced pressure into steam space 15, acting on top of head 3la of steam valve extension 3|. This serves to reduce the pressure on the upper area of the head Ma and reduces the upward pull necessary to lift the steam valve 26 from its seat. Continued upward movement of operating rod 14 opens steam valve 28, withdrawing head 3la of extension 3| from the steam nozzle 32 and permits the injector to go into operation. While the injector is thus manipulated, its overflow valve is open, and may then be closed by hand, if so desired in order to handle hot water, or it may close automatically as is common to certain types of injectors.

When the steam valve is in wide open position, as shown in Fig. 3, the head 3la of extension 3| will be positioned about central within the steam space 15 and the throttling disc I8 of the water valve l3 somewhat below the water valve opening.

'In this position it will be noted that the maximum amount of water which may enter the injector through the water valve is governed by the distance between water valve seat l6 and the lower edge [5a of guide I5.

Further upward movement of rod it will serve gradually to reduce the distance between the upper edge l8a of the throttling disc l8 and the lower edge l4a of guide l4, thus reducing and regulating the amount of water entering into the injector water chamber l1. It will also be noted that such additional upward movement will bring the head 3Ia of steam valve extension 3| into the narrowing or diverging opening in steam valve seat 30, thus also reducing the amount of steam entering into steam nozzles 32 and 45, in the same proportion as the amount of water is reduced by throttling disc Hi.

When hand lever H is operated to shut off the injector, rod 14 is lowered, forcing steam valve stem 31 and water valve stem [9 downwardly bringing main steam valve 28 and pilot valve 38 to their seats, thus shutting off admission of steam from inlet l2.

Collapsible link members 59 and 6| are held in the position where stops 62 and 63 are in contact until the rollers 64 and 65 on pin 60 disengage vertical faces 68 of cams 66 and 61. When the rollers 64 and 65 have passed edges 16 of the cams, additional downward movement of the connecting pin 60 permits link members 69 and 60 to collapse and assume the position shown in Fig. 5, the additional downward movement of the water valve stem l9 bringing the water valve to its seat to shut off the water supply from inlet l I.

In Fig, 7 is shown the position of the water valve 13 which it assumes if the injector should break while the overflow valve is closed. The steam in the injector body then exerts a pressure against the bottom of the throttling disc i8 and forces the same upwardly against the tension of the spring 2| until it closes the water valve opening, thus preventing steam from entering the water supply and heating the same unduly. Further downward movement of the lever to close the steam valve 28 will then in turn compress the spring 2| somewhat, there being sufiicient space left between its coils, and continued downward motion of the lever 21 will finally close the water valve 13.

While the water valve and throttle disc which latter acts as a check valve are shown in combination with an injector operated by a single lever, the same principle could, of course, be employed with injectors in which the water valve is independently operated, and in which this construction provides a safety feature against steam blow backs into the water supply.

It is also obvious that while I have disclosed the starting mechanism in connection with a vertical type of injector, the same may be applied to horizontal types as well, and moreover may be used with injectors having types of nozzles and dispositions of such different from the one shown.

It is understood that various other changes of form, proportions and minor details of construction may be resorted to without departing from the principles or sacrificing any of the advantages of the invention as defined in the appended claims.

What I claim as new, is:

1. In an injector, a casing, a water valve and a main steam valve secured in laterally spaced relation in said casing and independently removable therefrom, an operating lever connected to open both valves, and mechanical means between the said lever and steam valve to cause the steam valve to open, independent of steam pressure in the injector, after the water valve has been opened.

2'. In. an injector, a Water valve and a steam valve, an operating lever having connection to both valves for opening and closing the same, the said connection including a pair of links pivotally connected to the said lever and steam valve, adapted to permit the steam valve to remain closed until the water valve has been opened fully.

3. In an injector, a Water valve and a steam valve, an operating lever connected to both valves, and a pair of links pivotally connected to the said lever and steam valve having limited movement with respect to each other adapted, when opening the valves, to permit the steam valve to remain closed until the water valve has been opened fully and, when closing, the water valve to remain open until the steam valve has been closed.

4. In an injector, a water valve and a steam valve, both normally closed, an operating lever connected to both valves, a pair of links pivotally connected to the said lever and steam valve having limited movement with respect to each other adapted to permit the steam valve to remain closed until the water valve has been opened fully, and means to prevent movement of the said links with respect to each. other after opening of the water valve to open the said steam valve.

5. In an injector, a water valve and a steam valve, both normally closed, an operating lever connected to both valves, a pair of links pivotally connected to the said lever and steam valve having limited movement with respect to each other adapted to permit the steam valve to remain closed until the water valve has been opened fully, and stationary means to prevent movement of the said links with respect to each other after opening of the Water valve to open the said steam valve.

6. In an injector, a water valve and a steam valve, an operating means connected to both valves, including a collapsible pair of links and earns coacting therewith between the said lever and steam valve to force the steam valve to remain closed until the water valve has been opened fully, and to keep the water valve open until the steam valve has been closed.

7. In an injector, a casing having a water opening, a water valve stem extending into the said casing, operating means for the said stem, a Water valve yieldingly connected to the said stem within the casing and adapted to close the said opening, and a throttling member projecting from the said valve through the said opening, the said operating means adapted to open the said water valve fully and by continued movement in the same direction bring the said member in throttling relation with the said opening.

8. In an injector, a casing having a water opening and a steam opening, a water valve stem extending into the said casing, a water valve yieldingly connected to the said stem within the easing and adapted to close the said water opening, a steam valve adapted to closethe said steam opening, operating means common to both valves, and a throttling member projecting from the said water valve through the said water opening, the said operating means adapted to open the said water valve fully and by continued movement in the same direction bring the said member in throttling relation with the said water opening.

9. In an'injector, a water valve and a steam valve, operating means common to both valves, the said water valve being yieldingly connected to the said operating means and adapted to close a water opening, a throttling member projecting from the said valve through the said opening, the said operating means adapted to open the said water valve fully and by continued movement in the same direction bring the said member in throttling relation with the said opening, and a pair of links and cams coacting therewith between the said operating means and the steam valve to force thesteam valve to remain closed until the water valve has been opened fully, and to keep the water valve open until the steam valve has been closed.

10. In an injector, a casing having a water opening, a water valve stem extending into the said casing, operating means for the said stem, a water valve yieldingly connected to the said stem within the casing and adapted to close the said opening, and a shut-off member projecting from the said valve through the said opening adapted to close the opening by pressure Within the injector operating in a direction opposite to that of the closing movement of the said valve upon a rise of pressure sufiicient to cause breaking of the injector while the water valve is in an open position.

11. In an injector, a casing having a water opening, a water valve stem extending into the said casing, operating means for the said stem, a Water valve yieldingly connected to the said stem within the casing and adapted to close the said opening, and a throttling member projecting from the said valve through the said opening, the said operating means adapted to open the said water valve fully and by continued movement in the same direction bring the said member in throttling relation with the said opening, the said member adapted to close the said opening by pressure within the injector due to its breaking while the water valve is in an open position.

12. In a injector, a water valve and a steam valve, an operating lever connected to both valves, the said water valve being yieldingly connected to the said lever and adapted to close a water opening, a pair of links pivotally connected to the said lever and steam valve adapted to permit the steam valve to remain closed until the water valve has been opened fully, and a shut-oil member projecting from the said water valve, through the said opening to close the opening by pressure within the injector due to its breaking While the water valve is in an open position.

13. In an injector, a water valve and a steam valve, an operating lever connected to both valves, the said water valve being adapted to close a water opening, and a throttling member projecting from the said water valve through the said opening, the said steam valve positioned in and adapted to close a steam opening diverging in shape and having an extension with an enlarged head projecting through the said steam opening, the said member adapted to throttle the said water opening upon movement of the operating lever in the direction to open the valves, while simultaneously the head of the said extension is brought into the said diverging steam opening to throttle the steam opening proportionately.

14. In an injector, a water valve and a steam valve, an operating lever connected to both valves, the said water valve adapted to close a water opening, a throttling member projecting from the said water valve the said water valve through the said opening, the said steam valve positioned in and adapted to close a steam opening diverging in shape, and a steam nozzle below the said steam opening, the steam valve having an extension with an enlarged head entering a central bore of the said nozzle, the said member adapted to throttle the said water opening upon movement of the operating lever in the direction to open the valves, while simultaneously the head of the extension of the said steam valve is brought into the diverging opening below the steam valve to throttle the steam opening proportionately.

15. In an injector, a water valve and a steam valve, an operating lever connected to both valves, being yieldingly connected to the said lever and adapted to close a water opening, a throttling member projecting from the said water valve through the said opening, the said lever adapted to open the said water valve fully and by continued movement bring the said member in throttling relation with the said opening, a pair of links and cams coacting therewith between the said lever and the said steam valve to force the steam valve to remain closed until the water valve has been opened fully and upon reverse movement of said lever to keep the water valve open until the steam valve has been closed, the said steam valve positioned in and adapted to close a steam opening diverging in shape, and an extension to the said steam valve projecting through the said steam opening having an enlarged head, the said member adapted to throttle the said water opening while simultaneously the head of the said extension is brought into the said diverging steam opening to throttle the steam opening proportionately.

16. In an injector, a main steam valve and a pilot valve, operating means for the said valves, a steam nozzle, the said steam valve having an extension with an enlarged head entering a central bore of the said nozzle, and means to reduce the steam pressure upon the said head including a steam passage of restricted area around the main steam valve in communication with the steam space above the said head after opening of the said pilot valve to facilitate opening of the main steam valve.

17. In an injector, a water valve and a steam valve, an operating lever connected to both valves, the said water valve adapted to close a water opening, a throttling member projecting from the said water valve through the said opening, the said steam valve positioned in and adapted to close a steam opening diverging in shape, a pilot valve within the steam valve, a steam nozzle, the said steam valve having an extension with an enlarged head entering a central bore of the said nozzle, means to reduce the steam pressure upon the said head including a steam passage of restricted area around the steam valve in communication with the steam space above the said head after opening of the said pilot valve to facilitate opening of the said steam valve, the said member adapted to throttle the said water opening upon movement of the operating lever in the direction to open the valves, while simultaneously the head of the said extension is brought into the said diverging steam opening to throttle the steam opening proportionately.

BENGT E. FOLKE. 

